Re-Reland: Make media/capture gn and gyps produce components

media/cast/cast.gyp

Index: media/cast/cast.gyp
diff --git a/media/cast/cast.gyp b/media/cast/cast.gyp
index b2d930adad72e99390ea64d042b28b9f077a0fd5..4d8e83e4b67aeeb297dd397624e58ffe4d40d2e2 100644
--- a/media/cast/cast.gyp
+++ b/media/cast/cast.gyp
@@ -131,6 +131,9 @@
             '<(DEPTH)/third_party/libvpx/libvpx.gyp:libvpx',
           ],
         }], # OS=="ios"
+        ['OS=="win"', {
+          'dependencies': [ '<(DEPTH)/media/media.gyp:mf_initializer' ],
+        }],
       ], # conditions
     },
     {